Patent US3374131A successfully refreshed from Google Patents.
US3374131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of building a pneumatic tire
Assignee: Dunlop Rubber Co Ltd
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Filing: 1963-10-15
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Granted: 1968-03-19
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Expires: 1983-10-15
Abstract
No abstract record available.
Inventors
- 👤 Gough Vernon Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:40
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D30/20; B29D30/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A METHOD OF BUILDING A PENUMASTIC TIRE INCORPORATING A CYLINDER HAVING AT LEAST TWO LAYERS OF RUBBERISED PARALLEL CORDS, THE CORDS IN EACH PLY LAYER BEING DISPOSED IN THE CROWN REGION IN THE FINISHED TIRE AT A FINISHED BIAS ANGLE OF BETWEEN 5* AND 30* TO A CIRCUMFERENTIAL LINE OF THE TIRE CROSSING THE CORDS AT A POINT UNDER CONSIDERATION, COMPRISING INITIALLY FORMING SAID CYLINDER FROM LAYERS IN WHICH THE CORDS ARE DISPOSED AT BIAS ANGLES SUBSTANTIALLY EQUAL TO THE COMPLEMENTARY ANGLE TO SAID FINISHED BIAS ANGLE, THE CORDS OF ONE LAYER CROSSING THE CORDS OF THE OTHER LAYER, AND STRETCHING SAID CYLINDER IN THE CIRCUMFERENTIAL DIRECTION OF SAID CYLINDER TO INCREASE THE CIRCUMFERENCE OF SAID CYLINDER UNTIL THE BIAS ANGLES OF THE CORDS OF THE TWO LAYERS ARE REDUCED TO SAID FINISHED BIAS ANGLE.
Claim 2
Independent Claim
135 words
A METHOD OF BUILDING A PENUMASTIC TIRE INCORPORATING A CYLINDER HAVING AT LEAST TWO LAYERS OF RUBBERISED PARALLEL CORDS, THE CORDS IN EACH PLY LAYER BEING DISPOSED IN THE CROWN REGION IN THE FINISHED TIRE AT A FINISHED BIAS ANGLE OF BETWEEN 5* AND 30* TO A CIRCUMFERENTIAL LINE OF THE TIRE CROSSING THE CORDS AT A POINT UNDER CONSIDERATION, COMPRISING INITIALLY FORMING SAID CYLINDER FROM LAYERS IN WHICH THE CORDS ARE DISPOSED AT BIAS ANGLES SUBSTANTIALLY EQUAL TO THE COMPLEMENTARY ANGLE TO SAID FINISHED BIAS ANGLE, THE CORDS OF ONE LAYER CROSSING THE CORDS OF THE OTHER LAYER, AND STRETCHING SAID CYLINDER IN THE CIRCUMFERENTIAL DIRECTION OF SAID CYLINDER TO INCREASE THE CIRCUMFERENCE OF SAID CYLINDER UNTIL THE BIAS ANGLES OF THE CORDS OF THE TWO LAYERS ARE REDUCED TO SAID FINISHED BIAS ANGLE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |